UltraTech 9208 helps in informing and educating public that storm drains generally go to the waterways directly, without any treatment. Features: Size: 3-7/8-inches diameter. Material - Plastic Installs easily and quickly with help of permanent adhesive. It is cleaner and more environment friendly than stencils and paint. It is made for long life. It has a heavy duty plastic construction which is scratch resistant. This does not corrode or rust. Helps comply with NPDES, 40 CFR 122.26 (1999) when used as best management practice in storm water pollution prevention plans.